ssb: update reject bit for Target State Low

My 14e4:4315 is SSB_IDLOW_SSBREV_26:
read32 0xfaafcff8 -> 0x600422d5
My 14e4:4328 is SSB_IDLOW_SSBREV_24:
read32 0xfaafcff8 -> 0x400422c5
My 14e4:432b is SSB_IDLOW_SSBREV_26 again:
read32 0xfaafcff8 -> 0x600422d5

For all of them wl driver is using 0x2 reject bit:
write32(0xf98) <- 0x00010002
So it seems SSB 2.3 is the exception using another bit.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/ssb/main.c b/drivers/ssb/main.c
index 74aa2cc..ad3da93 100644 (file)
--- a/drivers/ssb/main.c
+++ b/drivers/ssb/main.c
@@ -1117,23 +1117,22 @@ static u32 ssb_tmslow_reject_bitmask(struct ssb_device *dev)
 {
        u32 rev = ssb_read32(dev, SSB_IDLOW) & SSB_IDLOW_SSBREV;
 
-       /* The REJECT bit changed position in TMSLOW between
-        * Backplane revisions. */
+       /* The REJECT bit seems to be different for Backplane rev 2.3 */
        switch (rev) {
        case SSB_IDLOW_SSBREV_22:
-               return SSB_TMSLOW_REJECT_22;
+       case SSB_IDLOW_SSBREV_24:
+       case SSB_IDLOW_SSBREV_26:
+               return SSB_TMSLOW_REJECT;
        case SSB_IDLOW_SSBREV_23:
                return SSB_TMSLOW_REJECT_23;
-       case SSB_IDLOW_SSBREV_24:     /* TODO - find the proper REJECT bits */
-       case SSB_IDLOW_SSBREV_25:     /* same here */
-       case SSB_IDLOW_SSBREV_26:     /* same here */
+       case SSB_IDLOW_SSBREV_25:     /* TODO - find the proper REJECT bit */
        case SSB_IDLOW_SSBREV_27:     /* same here */
-               return SSB_TMSLOW_REJECT_23;    /* this is a guess */
+               return SSB_TMSLOW_REJECT;       /* this is a guess */
        default:
                printk(KERN_INFO "ssb: Backplane Revision 0x%.8X\n", rev);
                WARN_ON(1);
        }
-       return (SSB_TMSLOW_REJECT_22 | SSB_TMSLOW_REJECT_23);
+       return (SSB_TMSLOW_REJECT | SSB_TMSLOW_REJECT_23);
 }
 
 int ssb_device_is_enabled(struct ssb_device *dev)

diff --git a/include/linux/ssb/ssb_regs.h b/include/linux/ssb/ssb_regs.h
index 402955a..efbf459 100644 (file)
--- a/include/linux/ssb/ssb_regs.h
+++ b/include/linux/ssb/ssb_regs.h
@@ -97,7 +97,7 @@
 #define  SSB_INTVEC_ENET1      0x00000040 /* Enable interrupts for enet 1 */
 #define SSB_TMSLOW             0x0F98     /* SB Target State Low */
 #define  SSB_TMSLOW_RESET      0x00000001 /* Reset */
-#define  SSB_TMSLOW_REJECT_22  0x00000002 /* Reject (Backplane rev 2.2) */
+#define  SSB_TMSLOW_REJECT     0x00000002 /* Reject (Standard Backplane) */
 #define  SSB_TMSLOW_REJECT_23  0x00000004 /* Reject (Backplane rev 2.3) */
 #define  SSB_TMSLOW_CLOCK      0x00010000 /* Clock Enable */
 #define  SSB_TMSLOW_FGC                0x00020000 /* Force Gated Clocks On */